1359954 九、發明説明： 【發明所屬之技術領域】 本發明關於一種光學鏡頭，且特別是關於一種變焦鏡 頭（zoom lens) 〇 【先前技術】 圖1為顯示一習知變焦鏡頭100之示意圖。如圖1所 示，變焦鏡頭100包含一第一透鏡群110以及一第二透鏡 群130。第一透鏡群110由三片透鏡112、114、116所組 成’而第二透鏡群130由二片透鏡132與134所組成。 為了在維持良好成像品質的前提下使變焦鏡頭1〇〇具 有較小的f數值(f number)，第一透鏡群110中的透鏡114、 116以及第二透鏡群130中的透鏡132皆為非球面透鏡以 消除像差(image aberration)。然而，非球面透鏡的價格昂 貴、製作困難度較高，導致變焦鏡頭10〇的生產成本偏高 且增加組裝難度。 【發明内容】 造成本及良好的成像品質。 本發明提供-種變鱗頭，其具有低製造難度、低製 依本發明之一實施例，一 ，一種變焦鏡頭包含一第一透鏡1359954 IX. Description of the Invention: The present invention relates to an optical lens, and more particularly to a zoom lens. [Prior Art] FIG. 1 is a schematic view showing a conventional zoom lens 100. As shown in FIG. 1, the zoom lens 100 includes a first lens group 110 and a second lens group 130. The first lens group 110 is composed of three lenses 112, 114, 116 and the second lens group 130 is composed of two lenses 132 and 134. In order to make the zoom lens 1 〇〇 have a small f-number (f number) while maintaining good image quality, the lenses 114 and 116 in the first lens group 110 and the lens 132 in the second lens group 130 are all non- Spherical lenses to eliminate image aberrations. However, the aspherical lens is expensive and difficult to manufacture, resulting in a high production cost of the zoom lens 10 且 and an increase in assembly difficulty. SUMMARY OF THE INVENTION This causes good and good image quality. The present invention provides a variable scale head having low manufacturing difficulty and low manufacturing. According to an embodiment of the present invention, a zoom lens includes a first lens.
汴辨列的一第一透鏡、 透鏡所組成。第一透鏡、 6 -透鏡，、第三透鏡及第四魏的屈光度依序為正、負、 j、正。第二透鏡群具有正屈光度且配置於第-透鏡群與 侧之間。第—透鏡群基本上由從侧至像側依序排列的 ΐϊΐϊ鏡、—第六透鏡、—第七透鏡、—“透鏡及一 、兄所组成’且第五透鏡、第六透鏡、第七透鏡、第 透鏡及第九透鏡㈣光度依序為正、正、正、負、正。 第透鏡群與第二透鏡群適於在物側與像侧之間移動。 依本發明之另-實施例，一種變焦鏡頭包含一第一透 ί群及一第二透鏡群。第—透鏡群具有負屈光度，且第-，鏡群包含從-物側至—像側依序排列的—第—透鏡、一 =二透鏡、-第三透鏡及—第四透鏡。第—透鏡、第二透 鏡、第三透鏡及第四透鏡的屈光度依序為正、負、負、正。 第二透鏡群歸正屈光度且配置於透鏡群與像侧之 間，第二透鏡群包含從物側至像側依序排列的一第五透 鏡:一第六透鏡、-第七透鏡、-第人透鏡及—第九透鏡， 且第五透鏡、第六透鏡、第七錢、第八透鏡及第九透鏡 ^屈光度依序為正、正、正、負、正。第—透鏡群與第二 透鏡群適於在物側與像側之間移動，且第一透鏡群之焦距 為Π，第二透鏡群之焦距為F2及變焦鏡頭之總焦^為 Fw ’該變焦鏡頭滿足下列條件： 0.76463 <|F2/F1|< 0.89521 ； 1.48886 <|F1/Fw|< 1.86091 ;以及 1.33284 < |F2/Fw| < 1.46539。 於一實施例中，第一透鏡為一凹凸透鏡，第二透鏡為 1359954 靜i第三透鏡為—雙凹透鏡，第四透鏡為一凹凸 透iiT 一凹凸透鏡，第六透鏡為-凹凸透鏡， 雙凸透鏡’第八透鏡為-雙凹透鏡且第九透 鏡為透鏡，且第一至第九透鏡均為一球面透鏡。 、秀鐘，；Θ rj例中’第七透鏡及該第八透鏡構成一雙膠合 ⑽^Ι·、ί頭更包含—配置於透鏡與第九透鏡之 間的一孔徑光欄。 者透各個實施例，使用兩群變焦鏡頭結構且所 透鏡而完全未採用非球面透鏡的設 计^有效峰低鏡片製作與鏡頭纽震的困難度， 且 像品質的情況下大幅減少光學元件與鏡頭機_ 兴較ίίΐΓί上料徵和優點缺·祕，下文特 舉較佳實施例’並配合所附圖式，作詳細說明如下。 【實施方式】 下列各實施例的說明是參考附加 發明可用以實施之特定丨I即力肖以例不本 語，例如「上」、4貝=°本發明所提到的方向用 等，僅是參考附加圖式」的方：。」因「後」、「左」、「右」 用來說明，、而_來_本發明。，制的方向用語是 圖2的上半部二二焦鏡頭1〇的示意圖’ 呈現變焦鏡頭1G在望違H !：廣角端的狀態，且下半部 的狀態。變焦鏡頭10可作為投 影機、照相機、攝影機或監視器的鏡頭。變焦鏡頭10設置 於一物側與一像侧之間，通常在像側會設置一影像處理單 元丨8。影像處理單元18可為感光元件或光閥，感光元件 例如可為電荷粞合元件(charge coupled device ; CCD)或是 CMOS影像感測元件，而光閥例如可為數位微鏡裝置 (digital micro-mirror device ; DMD)或單晶矽液晶顯示面板 (liquid crystal on silicon panel ; LCOS panel)。 變焦鏡頭10包含從物側至像側依序排列的一第一透 鏡群12與一第二透鏡群14,其中第一透鏡群12的屈光度 為負’且第二透鏡群14的屈光度為正。第一透鏡群12包 含從物側至像側依序排列的一第一透鏡121、一第二透鏡 122、一第三透鏡123以及一第四透鏡124，且第一透鏡 121、第二透鏡122、第三透鏡123與第四透鏡124的屈光 度依序為正、正、負、正。在本實施例中，第一透鏡 為一凹凸透鏡，第二透鏡122為一凸凹透鏡，第三透鏡123 為一雙凹透鏡且第四透鏡124為一凹凸透鏡。 第二透鏡群14配置於第一透鏡群12與像側之間，且 第二透鏡群14包含從物側至像侧依序排列的一第五透鏡 141、一第六透鏡142、一第七透鏡143、一第八透鏡144 以及一第九透鏡145 ’且第五透鏡141、第六透鏡142、第 七透鏡143、第八透鏡144與第九透鏡145的屈光度依序 為正、正、正、負、正。在本實施例中，第五透鏡141為 一凹凸透鏡，第六透鏡142為一凹凸透鏡，第七透鏡143 為一雙凸透鏡’第八透鏡144為一雙凹透鏡且第九透鏡145 1359954 為雙凸透鏡。再者’第一透鏡121至第九透鏡145均為 ' 球面透鏡，且第七透鏡143及第八透鏡144構成一雙膠合 透鏡。 第一透鏡群12與第二透鏡群14可以在物側與像側之 間移動’以調整變焦鏡頭10的有效焦距(Effective Focal length，EFL)。詳言之，如圖2所示，當變焦鏡頭1〇的有 效焦距從廣角端調整為望遠端時，第一透鏡群12與第二透 鲁轉14朝相互靠近的方向移動。當變焦鏡頭1〇的有效焦 距從望遠端調整為廣角端時，第一透鏡群12與第二透鏡群 14朝相互遠離的方向移動。 為了使變焦鏡頭1〇具有良好的成像品質，並縮小變 焦鏡頭10的長度，於—實施例中變焦鏡頭1〇可滿 條件： ^ 0.76463 < |F2 / Fl| < 0.89521 1.48886 < |F1/Fw| < 1.86091 1.33284 <|F2/Fw|< 1.46539 ♦ ’其中F1為第—透鏡群12之焦距，F2為第二透鏡群14 ‘ 之焦距且Fw為變焦鏡頭10之總焦距。 - —般而言’變焦鏡頭1G可包含-孔徑光欄16，发献 置於第八透鏡144與第九透鏡145之間並隨第二透鏡群_ 移動。 f 在本實施例中，第-透鏡群12可作為補償群， 除球差(spherical aberration)與畸變。在第二透鏡群14中月 第九透鏡145為凸透鏡’可有效收集像歉光訊號，緩過 10 變焦鏡頭10放大投影至物側。另外，由於本實施例第一透 鏡121至第九透鏡145均為球面透鏡而完全未採用非球面 透鏡，即能有效消除像差，因此可降低鏡片製作與鏡頭組 裝的困難度，且可於具有良好成像品質的情況下大幅減少 光學元件與鏡頭機構的製造成本。 如下說明變焦鏡頭10之一透鏡設計實例。需注意下 述之表一及表二中所列的設計值並非用以限定本發明，任 何熟習此項技術之人士在參照本發明之後，當可對其參數 或設定作適當更動’惟其仍屬於本發明之範疇内。 \衣一 表面 曲率（1/mm) 間距（mm) 折射率 阿貝數 S1 ^69.4607 5.44 1.80 46.60 ' S2 177.8329 0.16 S3 48.3614 2.92 1.80 46.60 S4 19.5641 9.60 S5 -161.2022 1.00 1.52 77.30 S6 29.9207 16.85 S7 31.6237 3.47 1.83 24.40 S8 36.6213 可變間距(dl) S9 62.7385 5.00 1.82 32.20 S10 -3488.0837 8.96 S11 39.2344 3.95 ΓΤ76 '~----- 49.50 S12 743.7298 0.10 S13 22.5529 6.00 1.50 \~fL50~ 26Λ0~ -----~~___ S14 -31.8452 6.16 ~---:-- 1.77 — S15 17.4561 1.48 S16 58.9927 2.79 1.81 39.00~ S17 -35.4723 可變間距(d2) 離，二 1359954 主軸上之直線距離。此外，在表一 一透鏡121的兩表面，| $ 又 、S2為第 ’衣甶表面S3、S4為第 表面’表面S5、S6為第三透鏡123的兩表面兄122的兩 S8為第四透鏡124的兩表面，表面S9、S10為第 二的兩表面’表面S11、su為第六透鏡i42::=鏡 表面su為第七透鏡143的一表面，表面s ^面^ M3與第八透鏡144的膠合面 為弟七透鏡 的一表面，表面S16、S17炎哲 為第八透鏡144 表面S16 S17為第九透鏡145的兩表面。 角端 望遠臨 可變間距 (mm) dl 12.61 土必响 4.11 d2 24.73 28.02 ----_. α μ日珂於弟二透鏡群14移動，因 2二t群12與第二透鏡群14之間的軸向距離為可變 間距d卜第九透鏡145的表面奶與影像處理單元w之 間的軸向距離為可變間距d2。轴向距射具有多個执定 值。具體而言，當投影距離改變時，可藉由調整第一=鏡 群12與第二透鏡群14的軸向距離，來改變成像面之位置。 舉例來說，轴向距離可以是多個不同的距離值其中之一， 而藉由機構來使軸向距離在這些距離值之間切換，使得變 焦鏡頭10可以投影出多種尺寸的影像晝面。 圖3至圖7為圖2之變焦鏡頭10在廣角端成像的光 學數據模擬圖。圖3為光學調變傳遞函數(m〇dulati〇n transfer function;MTF)曲線圖’其撗軸為以線對數/毫米表 12 1359954It consists of a first lens and a lens. The diopter of the first lens, the 6-lens, the third lens, and the fourth Wei are positive, negative, j, and positive. The second lens group has a positive refractive power and is disposed between the first lens group and the side. The first lens group basically consists of a frog mirror arranged in order from the side to the image side, a sixth lens, a seventh lens, a "lens and a brother, and a fifth lens, a sixth lens, and a seventh lens. The illuminance of the lens, the first lens, and the ninth lens (four) is positive, positive, positive, negative, and positive. The first lens group and the second lens group are adapted to move between the object side and the image side. For example, a zoom lens includes a first lens group and a second lens group. The first lens group has a negative refracting power, and the first-, lens group includes a -first lens arranged in order from the object side to the image side. a first lens, a third lens, and a fourth lens. The diopter of the first lens, the second lens, the third lens, and the fourth lens are positive, negative, negative, and positive. The second lens group is corrected. The diopter is disposed between the lens group and the image side, and the second lens group includes a fifth lens sequentially arranged from the object side to the image side: a sixth lens, a seventh lens, a first lens, and a ninth lens Lens, and fifth lens, sixth lens, seventh money, eighth lens and ninth lens ^ diopter Positive, positive, positive, negative, positive. The first lens group and the second lens group are adapted to move between the object side and the image side, and the focal length of the first lens group is Π, and the focal length of the second lens group is F2 And the total focus of the zoom lens is Fw 'The zoom lens satisfies the following conditions: 0.76463 <|F2/F1|<0.89521; 1.48886 <|F1/Fw|<1.86091; and 1.33284 < |F2/Fw| < 1.46539. In one embodiment, the first lens is a meniscus lens, the second lens is 1359954, the third lens is a double concave lens, the fourth lens is a concave-convex iiT-concave lens, and the sixth lens is - The meniscus lens, the lenticular lens 'the eighth lens is a double concave lens and the ninth lens is a lens, and the first to ninth lenses are all spherical lenses. · Show clock, Θ rj example 'the seventh lens and the eighth The lens constitutes a double glue (10), and the ί head further includes an aperture diaphragm disposed between the lens and the ninth lens. Through various embodiments, two groups of zoom lens structures are used and the lens is completely non-used. Spherical lens design ^Efficient peak low lens manufacturing and lens New Earth In the case of quality, the optical component and the lens camera are greatly reduced. The advantages and disadvantages of the present invention are described below, and the following description is given in detail with reference to the accompanying drawings. The description of the following embodiments refers to the specific 丨I that can be implemented by referring to the additional invention, that is, the singularity, such as "upper", 4 Å = °, the direction mentioned in the present invention, etc., only reference is attached. The side of the schema: "Below", "Left", and "Right" are used to explain, and _ to _ the present invention. The direction of the system is the schematic diagram of the upper half of the two-two-focus lens of Fig. 2, which shows that the zoom lens 1G is in a state of looking at the H!: wide-angle end, and the state of the lower half. The zoom lens 10 can be used as a lens of a projector, a camera, a camera, or a monitor. The zoom lens 10 is disposed between an object side and an image side, and an image processing unit 丨8 is usually disposed on the image side. The image processing unit 18 can be a photosensitive element or a light valve. The photosensitive element can be, for example, a charge coupled device (CCD) or a CMOS image sensing element, and the light valve can be, for example, a digital micro mirror device (digital micro- Mirror device; DMD) or liquid crystal on silicon panel (LPOS panel). The zoom lens 10 includes a first lens group 12 and a second lens group 14 which are sequentially arranged from the object side to the image side, wherein the diopter of the first lens group 12 is negative and the diopter of the second lens group 14 is positive. The first lens group 12 includes a first lens 121, a second lens 122, a third lens 123, and a fourth lens 124, which are sequentially arranged from the object side to the image side, and the first lens 121 and the second lens 122. The diopter of the third lens 123 and the fourth lens 124 are positive, positive, negative, and positive. In this embodiment, the first lens is a meniscus lens, the second lens 122 is a convex-concave lens, the third lens 123 is a double concave lens, and the fourth lens 124 is a meniscus lens. The second lens group 14 is disposed between the first lens group 12 and the image side, and the second lens group 14 includes a fifth lens 141, a sixth lens 142, and a seventh array which are sequentially arranged from the object side to the image side. The diopter of the lens 143, an eighth lens 144, and a ninth lens 145' and the fifth lens 141, the sixth lens 142, the seventh lens 143, the eighth lens 144, and the ninth lens 145 are positive, positive, and positive. Negative, positive. In this embodiment, the fifth lens 141 is a meniscus lens, the sixth lens 142 is a meniscus lens, and the seventh lens 143 is a lenticular lens. The eighth lens 144 is a double concave lens and the ninth lens 145 1359954 is a lenticular lens. . Further, the first lens 121 to the ninth lens 145 are both 'spherical lenses, and the seventh lens 143 and the eighth lens 144 constitute a double cemented lens. The first lens group 12 and the second lens group 14 are movable between the object side and the image side to adjust the effective focal length (EFL) of the zoom lens 10. In detail, as shown in Fig. 2, when the effective focal length of the zoom lens 1 is adjusted from the wide-angle end to the telephoto end, the first lens group 12 and the second transparent roller 14 are moved toward each other. When the effective focal length of the zoom lens 1〇 is adjusted from the telephoto end to the wide-angle end, the first lens group 12 and the second lens group 14 move in directions away from each other. In order to make the zoom lens 1 良好 have good image quality and reduce the length of the zoom lens 10, in the embodiment, the zoom lens 1 〇 can be full: ^ 0.76463 < |F2 / Fl| < 0.89521 1.48886 < |F1 /Fw| < 1.86091 1.33284 <|F2/Fw|< 1.46539 ♦ 'where F1 is the focal length of the first lens group 12, F2 is the focal length of the second lens group 14' and Fw is the total focal length of the zoom lens 10. In general, the zoom lens 1G may include an aperture stop 16 that is placed between the eighth lens 144 and the ninth lens 145 and moves with the second lens group _. f In the present embodiment, the first lens group 12 can be used as a compensation group, in addition to spherical aberration and distortion. In the second lens group 14, the ninth lens 145 is a convex lens ′, which can effectively collect the apology signal, and the zoom lens 10 is zoomed out and projected onto the object side. In addition, since the first lens 121 to the ninth lens 145 are both spherical lenses and the aspherical lens is not used at all, the aberration can be effectively eliminated, thereby reducing the difficulty in lens fabrication and lens assembly, and The manufacturing cost of the optical component and the lens mechanism is greatly reduced in the case of good image quality. An example of lens design of the zoom lens 10 will be described below. It should be noted that the design values listed in Tables 1 and 2 below are not intended to limit the present invention, and any person skilled in the art can appropriately change the parameters or settings after referring to the present invention. Within the scope of the invention. \ Clothing surface curvature (1/mm) Spacing (mm) Refractive index Abbe number S1 ^69.4607 5.44 1.80 46.60 ' S2 177.8329 0.16 S3 48.3614 2.92 1.80 46.60 S4 19.5641 9.60 S5 -161.2022 1.00 1.52 77.30 S6 29.9207 16.85 S7 31.6237 3.47 1.83 24.40 S8 36.6213 Variable pitch (dl) S9 62.7385 5.00 1.82 32.20 S10 -3488.0837 8.96 S11 39.2344 3.95 ΓΤ76 '~------ 49.50 S12 743.7298 0.10 S13 22.5529 6.00 1.50 \~fL50~ 26Λ0~ -----~~ ___ S14 -31.8452 6.16 ~---:-- 1.77 — S15 17.4561 1.48 S16 58.9927 2.79 1.81 39.00~ S17 -35.4723 Variable pitch (d2) away, two 1359954 Straight line distance on the spindle. Further, on both surfaces of the table-one lens 121, |$ and S2 are the first 'clothing surface S3, S4 is the first surface', and the surface S5 and S6 are the two surfaces S122 of the third lens 123. Both surfaces of the lens 124, the surfaces S9, S10 are the second surfaces of the second surface S11, su are the sixth lens i42:: = the mirror surface su is a surface of the seventh lens 143, the surface s ^ surface ^ M3 and the eighth The cemented surface of the lens 144 is a surface of the seventh lens, and the surfaces S16 and S17 are the eighth lens 144. The surface S16 S17 is the two surfaces of the ninth lens 145. The corner end is far away from the variable pitch (mm) dl 12.61 The soil must be 4.11 d2 24.73 28.02 ----_. The α μ 珂 is moved by the second lens group 14 because of the 2nd group 12 and the second lens group 14 The axial distance between the two is a variable pitch d. The axial distance between the surface milk of the ninth lens 145 and the image processing unit w is a variable pitch d2. The axial distance has multiple assertions. Specifically, when the projection distance is changed, the position of the image plane can be changed by adjusting the axial distance of the first = mirror group 12 and the second lens group 14. For example, the axial distance can be one of a plurality of different distance values, and the axial distance is switched between the distance values by the mechanism such that the zoom lens 10 can project image sizes of various sizes. 3 to 7 are optical data simulation diagrams of the zoom lens 10 of Fig. 2 imaged at the wide-angle end. Figure 3 is a graph of the optical modulation transfer function (MTF), whose axis is in pairs of lines/mm. 12 1359954
示的空間頻率（spatial frequency in cycles per millimeter )， 縱軸為光學轉移函數的模數（modulus of the OTF)。圖4 為場曲(field curvature)圖和畸變(distortion)圖，其中場曲圖 的橫軸代表與焦面相距的距離，縱軸代表從〇到最大的 場，畸變圖的橫軸代表畸變百分比，縱軸代表從〇到最大 的場。圖5至圖7為橫向光線扇形(lateral ray fan)圖，其中 橫轴代表光線通過孔徑光攔16的不同位置，縱軸代表光線 照射到像平面的位置。如圖3所示，當空間頻率為47線對 數/毫米時，光學轉移函數的模數仍大於55% ;再者，如圖 4所示，畸變率在±2·5%以内，可知變焦鏡頭1〇具有良好 的成像品質。 藉由前述實施例，使用兩群之變焦鏡頭結構且所有透 鏡元件均為球面透鏡而完全未採用非球面透鏡的設計，可 有效降低鏡片製作與鏡頭組裝的困難度，且可於具有良好 成像品質的情況下大幅減少光學元件與鏡頭機構的製^成 本0The spatial frequency is in the interval per millimeter, and the vertical axis is the modulus of the OTF. Figure 4 is a field curvature diagram and a distortion diagram, where the horizontal axis of the field curvature map represents the distance from the focal plane, the vertical axis represents the field from 〇 to the maximum, and the horizontal axis of the distortion map represents the percentage of distortion. The vertical axis represents the field from 〇 to the largest. 5 to 7 are lateral ray fan diagrams in which the horizontal axis represents the different positions of the light passing through the aperture stop 16, and the vertical axis represents the position at which the light illuminates the image plane. As shown in Fig. 3, when the spatial frequency is 47 line logarithm/mm, the modulus of the optical transfer function is still greater than 55%; further, as shown in Fig. 4, the distortion rate is within ±2·5%, and the zoom lens is known. 1〇 has good imaging quality. With the foregoing embodiment, the two-lens zoom lens structure is used, and all the lens elements are spherical lenses without the aspherical lens design, which can effectively reduce the difficulty in lens fabrication and lens assembly, and can have good imaging quality. Significantly reduce the cost of optical components and lens mechanisms
—雖然本發明已以較佳實施例揭露如上’然其並非用以 限定本發明，任何所屬技術領域中具有通常知識者，在不 脫離本發明之精神和範_ ’當可作些許之更動與潤飾， 2本發明之保護範圍當視制之巾請專鄕圍所界定者 =:另外，本發明的任一實施例或申請專利範圍不 分露之全部目的或優點或特點。此外，摘要部 本來獅專歡件搜尋之用，並_來限制 本發明之權利範圍。 π 13 1359954 【圖式簡單說明】 圖1為顯示一習知變焦鏡頭之示意圖。 圖2為依本發明一實施例之變焦鏡頭的示意圖。 圖3至圖7為圖1之變焦鏡頭在廣角端成像的光學數 據模擬圖，其中圖3為光學調變傳遞函數曲線圖，圖4為 場曲圖和崎變圖，且圖5至圖7為橫向光線扇形圖。 【主要元件符號說明】 10 變焦鏡頭 12 第一透鏡群 121 第一透鏡 122 第二透鏡 123 第三透鏡 124 第四透鏡 14 第二透鏡群 141 第五透鏡 142 第六透鏡 143 第七透鏡 144 第八透鏡 145 第九透鏡 16 孔徑光欄 18 影像處理單元 100 變焦鏡頭 110 第一透鏡群 112、114、116 透鏡 14 1359954 130 第二透鏡群 132、134 透鏡 dl、d2 可變間距 F1 第一透鏡群焦距 F2 第二透鏡群焦距The present invention has been disclosed in its preferred embodiments as described above, but it is not intended to limit the invention, and any person skilled in the art can make a few changes and refinements without departing from the spirit and scope of the present invention. 2 The scope of protection of the present invention is defined by the scope of the invention. In addition, any of the objects or advantages or features of any embodiment or application of the invention are not disclosed. In addition, the abstract section is intended to be used for the search of lions, and to limit the scope of the invention. π 13 1359954 [Simple description of the drawing] Fig. 1 is a schematic view showing a conventional zoom lens. 2 is a schematic view of a zoom lens according to an embodiment of the present invention. 3 to FIG. 7 are optical data simulation diagrams of the zoom lens of FIG. 1 at the wide-angle end, wherein FIG. 3 is a graph of an optical modulation transfer function, FIG. 4 is a field curvature diagram and a sagittal diagram, and FIGS. 5 to 7 are Transverse ray pie chart. [Main component symbol description] 10 zoom lens 12 first lens group 121 first lens 122 second lens 123 third lens 124 fourth lens 14 second lens group 141 fifth lens 142 sixth lens 143 seventh lens 144 eighth Lens 145 ninth lens 16 aperture diaphragm 18 image processing unit 100 zoom lens 110 first lens group 112, 114, 116 lens 14 1359954 130 second lens group 132, 134 lens d1, d2 variable pitch F1 first lens group focal length F2 second lens group focal length
Fw 變焦鏡頭總焦距 S1-S17 透鏡表面Fw zoom lens total focal length S1-S17 lens surface
=-· ·、 15=-· ·, 15